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Monthly climate in Bontang, Indonesia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Bontang features a tropical rainforest climate (Af). Temperatures typically range between 27 °C (80 °F) and 27 °C (82 °F) through the year, but rarely can drop to 23 °C (74 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 2489 mm (98.0 inches) and receives 307 rainy days on the 1 mm (0.04 inches) threshold annually. Bontang enjoys an average of 3394 hours of sunshine throughout the year, and daylight varies from 12 hours 6 minutes to 12 hours 7 minutes per day.

Monthly average temperatures in Bontang, Indonesia

The warmest months in Bontang are May, October and November, with daily mean temperatures ranging from 27 to 27 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and July, when daily mean temperatures range from 27 to 27 °C (80 - 81 °F) throughout the day. On average each year, Bontang experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Bontang. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum32°C
(90°F)		31°C
(88°F)		32°C
(89°F)		32°C
(89°F)		32°C
(89°F)		31°C
(88°F)		31°C
(87°F)		31°C
(88°F)		31°C
(89°F)		32°C
(89°F)		31°C
(88°F)		32°C
(89°F)
Mean maximum31°C
(88°F)		31°C
(88°F)		31°C
(88°F)		31°C
(88°F)		31°C
(88°F)		31°C
(87°F)		30°C
(87°F)		31°C
(87°F)		31°C
(88°F)		31°C
(88°F)		31°C
(88°F)		31°C
(88°F)
Average high29°C
(85°F)		29°C
(85°F)		30°C
(85°F)		30°C
(85°F)		30°C
(86°F)		29°C
(85°F)		29°C
(85°F)		29°C
(85°F)		29°C
(85°F)		30°C
(86°F)		30°C
(85°F)		29°C
(85°F)
Daily mean27°C
(80°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)
Average low25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(78°F)		26°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)
Mean minimum24°C
(76°F)		24°C
(75°F)		24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)
Minimum24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(76°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		24°C
(75°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)

Compare climate in Bontang with other places

Compare temperature, precipitation, sunshine, UV index in Bontang, Indonesia with other places around the world.

Monthly average precipitation in Bontang, Indonesia

Bontang usually has the most precipitation in March, November and December, with an average of 27 rainy days and 248 mm (9.8 inches) of precipitation per month. The driest months in Bontang are February, August and September. On average, 169 mm (6.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Bontang. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)193 (7.6)184 (7.2)233 (9.2)222 (8.8)221 (8.7)215 (8.5)186 (7.3)160 (6.3)163 (6.4)200 (7.9)239 (9.4)272 (10.7)
Average precipitation days (≥ 1 mm)232326272826252422272729

Monthly sunshine hours in Bontang, Indonesia

The sunniest months in Bontang are May, July and August, when the sun shines an average of 9 hours 39 minutes a day. Least sunny months in Bontang: January, February and November receive an average of 8 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Bontang. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours233267294281295283298303286291277282
Mean daily daylight hours12h 6m12h 6m12h 6m12h 6m12h 6m12h 7m12h 6m12h 6m12h 6m12h 6m12h 6m12h 6m

Solar UV radiation in Bontang, Indonesia

Bontang experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 15 - 17, which corresponds to the Extreme category of sun exposure. June, July and December are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 13. For more detailed information, check out our hourly Bontang UV Index data.

Average daily maximum UV levels by month for Bontang. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141617151412131414151413